Can't really comment on the AMD64 side of things yet as I'm not running one yet

but I'm currently running my mates Corsair XMS4000TwinXPro (he blew his P4 up so I have the RAM atm

) in my Barton system which is amazing. Fast as anything and very very stable with nice timings (i think, not much good with timings but lower seems better).
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At absalute zerro all moleculer motion stops, and you can hear a Canadian say: "Think I may need a coat!"
Benching - CPU's = E6600 & Q6600 G0 SLACR / Mobo's = P5B "Vanilla" (stock) & P5WDH-D (fully vModded) / RAM = 1Gb PC5300 Crucial Ballistix Tracers & 1Gb Team Xtreem PC6400 custom / HDD = 160Gb IDE Cudda
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highest rank ever: 25th at 05 Nov 2006 12:30, most hwboints ever: 127.6 points at 05 Nov 2006 12:30)